Improvement in let-off motions for looms



-AvlfvAw A UNITED STATES PATENT OFFICE.

SAMUEL ESTES, OF NEWBURYPORT, MASSACHUSETTS, ASSIGNOR TO HIM- SELF AND O. O. MORSE; AND- SAID ESTES ASSIGNS HIS RIGHT TO HIRAM LITTLE FIELD IMPROVEMENT IN LET- OFF MOTIONS FOR LOOMS.

Specification forming part of Letters Patent No. 49,950, dated September 12 1865.

To all whom it may concimi:

Beitknown that I, SAMUEL EsTEs, of Newburyport, in the county of Essex and State of Massachusetts, have invented a new and Improved Let-Off Motion for Looms, and I do hereby declare that the followingis a full, clear, and exactdescription thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompany ing drawings, forming part of this specification, in which- Figure 1 represents a side elevation of this invention. Fig. 2y is a longitudinal vertical section of the saine.

Similar letters of reference indicate'corresponding parts.

The object of this invention is to govern the let-off motionof a loom by the power with which the hatten strikes the finished fabric in beating up.

The invention consists in making the reed, or that part of the batten which comes in contact with the woven fabric in beating up, yielding and combining it, by means of levers, pawl, and ratchetwheel, with the yarn-beam in such a manner that when the hatten moves forward and its yielding portion comesin contact with the woven fabric in beating up, the pawl is drawn back more or less, according to the force which said yielding part of the batte-n has to overcome in beating up, and when the hatten falls back the yarn-beam is turned in proportion to theinotion previously given to the pawl, and consequently thelet-olfmotion is regulated by the force of the blows exerted by the hatten in b'eating up, and the texture of the fabiic produced is of uniform density throughout.

A represents the frame of a loom, of anydesired construction, in which the batten Bis made to oscillate on the rod or rocker c in the usual manner. The reed b, or that portion of the hatten which comes in contact with the finished fabric in beating up, is connected to the main part of the hatten by means ot' springs c, and it is provided with a projection, d, from which a pin, e, extendsin the forked end of a bell-crank lever, O. This lever is hinged to one ot' the swords in such a position that it oscillates with the hatten outside the frame A. From its loose end extends a pin, f, and when the reed b or yielding portion of the hatten comes in contact with the finished fabric in beating up, the springs c yield and the pin f of the bell-crank lever comes in contact with a lever, D, that is attached by a pivot, g, to the frame A. A spring, h, has a-tendency to throw this lever in the direction toward the yarn-beam, and when the pinfst-rikes said lever it moves in the direction from the yarnbeani against the action of the spring h.

From the lever D extends a pawl, E, which engages with a ratchet -wheel, F, and this wheel is secured to an arbor, t', on which is mounted a pinion,j, that gears in a cog-wheel, k, secured to the end ofthe yarnlbeam G. The arbor t' is held at rest when not acted upon by the pawl E by the friction-strap and weight l. When the batten moves forward to beat up, the pawl E is caused to move in the direction of the arrow marked on it in Fig. l by the action of the pin fof the bell-crank lever O on thel lever D, and when the betten falls back the lip m projecting from the hatten strikes the upper end of the lever D and causes the same, with the pawl, to move in the direction opposite the arrow marked on said pawl in Fig. l. and thereby the ratchet-wheel F is turned and the yarn-beam is caused to let oft' a quantity otyarn, which depends upon thea mount otmotion imparted to the pawl E. If the hatten beats up hard the yielding portion thereof recedes more than it does when the battenheats up light, and consequently more yarn is let ott' in the former case than in the latter. The quantity ot' yarn let off is thus made dependent entirely upon the force ot' the blows exerted by the hatten in beating up, and a texture of uniform density is produced. Iffor some reason the weft-thread gives out, or if no weft is put in, the batten on its next stroke will not beat up, and no yarn is let off, but as long as the weft is putin regularly, and the tension ofthe yarirbeam remains uniform, the density ofthe tcxturewill also be uniform from beginning to end.

I claim as new and desire to secure by Letters Patent'- Making that part of the batten of a looin which cornes in contact with the inished fabric yielding and combining it, by suitable levers, O D, pawl E, and ratchet-wheel F, or their equivalents, with the yarn-beam G,substan tially as and for the purpose set forth.

Witnesses: SAMUEL ESTES.

A. W. SKINNEE, HENRY W. MoUL'roN. 

